CA2780235C - Synchronization of symmetric timing based servo bursts - Google Patents
Synchronization of symmetric timing based servo bursts Download PDFInfo
- Publication number
- CA2780235C CA2780235C CA2780235A CA2780235A CA2780235C CA 2780235 C CA2780235 C CA 2780235C CA 2780235 A CA2780235 A CA 2780235A CA 2780235 A CA2780235 A CA 2780235A CA 2780235 C CA2780235 C CA 2780235C
- Authority
- CA
- Canada
- Prior art keywords
- servo
- burst
- stripes
- stripe
- shifted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 claims description 14
- 230000007704 transition Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims 3
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000013500 data storage Methods 0.000 description 11
- 230000009977 dual effect Effects 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/09—Digital recording
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/712,039 | 2010-02-24 | ||
| US12/712,039 US8054568B2 (en) | 2010-02-24 | 2010-02-24 | Synchronization of symmetric timing based servo bursts |
| PCT/EP2011/050674 WO2011104050A2 (en) | 2010-02-24 | 2011-01-19 | Synchronization of symmetric timing based servo bursts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2780235A1 CA2780235A1 (en) | 2011-09-01 |
| CA2780235C true CA2780235C (en) | 2018-05-29 |
Family
ID=44476294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2780235A Active CA2780235C (en) | 2010-02-24 | 2011-01-19 | Synchronization of symmetric timing based servo bursts |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8054568B2 (zh) |
| EP (1) | EP2539894B1 (zh) |
| JP (1) | JP5651197B2 (zh) |
| KR (1) | KR101353308B1 (zh) |
| CN (1) | CN102770914B (zh) |
| CA (1) | CA2780235C (zh) |
| WO (1) | WO2011104050A2 (zh) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2518677A (en) | 2013-09-30 | 2015-04-01 | Ibm | Tape storage medium |
| JP6902497B2 (ja) | 2018-05-28 | 2021-07-14 | 富士フイルム株式会社 | 磁気テープ、磁気テープの製造方法、磁気テープの製造装置、及び記録再生システム |
| US10832715B1 (en) * | 2019-10-29 | 2020-11-10 | International Business Machines Corporation | Averaged slope timing-based-servo tape-creep detection |
| US11011198B1 (en) | 2019-10-29 | 2021-05-18 | International Business Machines Corporation | Tape-creep detection via frequency domain data |
| US10930309B1 (en) | 2019-10-29 | 2021-02-23 | International Business Machines Corporation | Tape-creep detection via trajectory and distortion angles |
| JPWO2021095720A1 (zh) * | 2019-11-12 | 2021-05-20 | ||
| US11373682B2 (en) * | 2020-08-27 | 2022-06-28 | Western Digital Technologies, Inc. | Data storage device reading data from magnetic tape in forward and reverse direction |
| US11488625B2 (en) | 2020-10-01 | 2022-11-01 | Western Digital Technologies, Inc. | Data storage device demodulating servo stripes using matched filter |
| US11488626B2 (en) | 2020-10-01 | 2022-11-01 | Western Digital Technologies, Inc. | Data storage device demodulating servo stripes using matched filter |
| US11295773B1 (en) | 2020-10-01 | 2022-04-05 | Western Digital Technologies, Inc. | Data storage device demodulating digital data based on number of servo stripes in servo frame |
| US11386928B2 (en) | 2020-10-01 | 2022-07-12 | Western Digital Technologies, Inc. | Data storage device demodulating servo stripes using matched filter |
| CN115296784B (zh) * | 2022-08-10 | 2023-10-20 | 横川机器人（深圳）有限公司 | 伺服驱动器低延时同步方法 |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4105863A (en) | 1976-12-20 | 1978-08-08 | Bell Telephone Laboratories, Incorporated | Arrangement for combining data symbols in accordance with a predetermined weighting function |
| US5448430A (en) | 1993-08-05 | 1995-09-05 | International Business Machines Corporation | Track following servo demodulation |
| US5689384A (en) * | 1994-06-30 | 1997-11-18 | International Business Machines Corporation | Timing based servo system for magnetic tape systems |
| US6049438A (en) | 1997-03-07 | 2000-04-11 | International Business Machines Corporation | Method and apparatus for encoding digital servo information in a servo burst |
| US5930065A (en) | 1997-05-16 | 1999-07-27 | International Business Machines Corporation | Timing based servo longitudinal addressing |
| US6542325B1 (en) | 1999-03-10 | 2003-04-01 | Imation Corp. | Time-based servo for magnetic storage media |
| US6278571B1 (en) * | 1999-05-19 | 2001-08-21 | International Business Machines Corporation | Adaptive servo gap detection for timing based servo |
| US6239939B1 (en) | 1999-08-09 | 2001-05-29 | International Business Machines Corporation | Robust detection of data modulated into a timing based servo |
| US6580581B1 (en) | 2000-08-16 | 2003-06-17 | International Business Machines Corporation | Recovery of lateral position of a servo system with respect to longitudinal servo bands of a magnetic tape |
| US6879457B2 (en) | 2002-02-13 | 2005-04-12 | International Business Machines Corporation | Timing based servo with fixed distances between transitions |
| JP4046284B2 (ja) | 2003-09-11 | 2008-02-13 | 富士フイルム株式会社 | 磁気テープおよびその製造方法、ならびにサーボライタおよびサーボ信号の書込み方法 |
| JP2005166140A (ja) | 2003-12-01 | 2005-06-23 | Fuji Photo Film Co Ltd | 磁気テープカートリッジおよびサーボライタ、ならびに磁気テープドライブおよびサーボ信号読取方法 |
| US7193800B2 (en) | 2004-05-06 | 2007-03-20 | Hitachi Global Storage Technologies Netherlands B.V. | Data recording medium with servo pattern having pseudo-noise sequences |
| US7280294B2 (en) * | 2004-11-30 | 2007-10-09 | International Business Machines Corporation | Tri-state servowriter driver with slow return to zero |
| US7365929B2 (en) * | 2006-07-30 | 2008-04-29 | International Business Machines Corporation | Synchronous servo channel for tape drive systems |
| JP4918407B2 (ja) * | 2007-05-21 | 2012-04-18 | 日立マクセル株式会社 | サーボ信号記録装置 |
| US20090040643A1 (en) * | 2007-07-19 | 2009-02-12 | Quantum Corporation | Method and apparatus for writing timing based servo tracks on magnetic tape using complementary servo writer pairs |
| US7742254B2 (en) | 2008-01-03 | 2010-06-22 | International Business Machines Corporation | Servo channel for tape drive systems |
| US7903368B2 (en) | 2008-02-01 | 2011-03-08 | International Business Machines Corporation | Tape cartridge having tape media with longitudinally shifted servo pattern for increased sampling rate |
| US7529061B2 (en) | 2008-02-01 | 2009-05-05 | International Business Machines Corporation | Tape drive for maintaining lateral position utilizing longitudinally shifted servo pattern with increased sampling rate |
| US7684143B2 (en) * | 2008-02-29 | 2010-03-23 | International Business Machines Corporation | Apparatus, system, and method for limiting frame spacing error during timing-based servo pattern fabrication |
| US20100079890A1 (en) * | 2008-09-26 | 2010-04-01 | Brummet Robert Allan | Method and apparatus for encoding positioning information on a magnetic tape media |
-
2010
- 2010-02-24 US US12/712,039 patent/US8054568B2/en not_active Expired - Fee Related
-
2011
- 2011-01-19 CN CN201180010675.9A patent/CN102770914B/zh not_active Expired - Fee Related
- 2011-01-19 EP EP11701075.1A patent/EP2539894B1/en active Active
- 2011-01-19 CA CA2780235A patent/CA2780235C/en active Active
- 2011-01-19 KR KR1020127019281A patent/KR101353308B1/ko not_active IP Right Cessation
- 2011-01-19 JP JP2012554256A patent/JP5651197B2/ja active Active
- 2011-01-19 WO PCT/EP2011/050674 patent/WO2011104050A2/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP2539894B1 (en) | 2013-04-17 |
| KR101353308B1 (ko) | 2014-01-23 |
| CN102770914B (zh) | 2015-07-29 |
| JP5651197B2 (ja) | 2015-01-07 |
| JP2013520762A (ja) | 2013-06-06 |
| WO2011104050A3 (en) | 2012-04-19 |
| EP2539894A2 (en) | 2013-01-02 |
| US20110205657A1 (en) | 2011-08-25 |
| CN102770914A (zh) | 2012-11-07 |
| US8054568B2 (en) | 2011-11-08 |
| KR20120123359A (ko) | 2012-11-08 |
| CA2780235A1 (en) | 2011-09-01 |
| WO2011104050A2 (en) | 2011-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20151126 |